Fix GHA workflow use of Ubuntu 20.04

Author: archigup

.github/workflows/ci.yml

@@ -103,7 +103,7 @@ jobs:
           path: ./
 
   formatting:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
 

.github/workflows/formatting.yml

@@ -16,7 +16,7 @@ jobs:
     if: ${{ github.event.issue.pull_request &&
         ( ( github.event.comment.body == '/bot run uncrustify' ) ||
           ( github.event.comment.body == '/bot run formatting' ) ) }}
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     steps:
     - name: Apply Formatting Fix
       uses: FreeRTOS/CI-CD-Github-Actions/formatting-bot@main